if it is seated so far down inthe recess that you cannot get tools / jaw grabber under it, and it is bad enough to replace.. then CAREFULLY weld a bead on it's face using low amp and low penetration.. like 6013 rod.. etc.
don't get into the parent metal. and a lil is better than alot.
let it cool, and then take the box and rap it upside down on some wood.. race will probably fall out. if this fails.. and it shouldnt.. then you may be recuced to taking a die grinder and a metal bur.. cone shaped preferably, and cutting about 95% thru the race then pry it ot. if you venture into the parent metal a tad.. no biggie.. there will be another race in it's palce soon.